package com.example.tests;

import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.testng.Assert.assertEquals;

import java.util.Random;

import org.testng.annotations.Test;

import com.example.utils.SortedListOf;

public class GroupModificationTests extends TestBase {

  @Test(dataProvider = "randomValidGroupGenerator")
  public void modifySomeGroup(GroupData group) {
    // save old state
    SortedListOf<GroupData> oldList = app.getGroupHelper().getGroups();

    Random rnd = new Random();
    int index = rnd.nextInt(oldList.size()-1);

    // actions
    app.getGroupHelper().modifyGroup(index, group);

    // save new state
    SortedListOf<GroupData> newList = app.getGroupHelper().getGroups();
    
    // compare states
    assertThat(newList, equalTo(oldList.without(index).withAdded(group)));
  }

}
